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31 #ifndef WebGLImageBufferSurface_h
32 #define WebGLImageBufferSurface_h
34 #include "platform/graphics/ImageBufferSurface.h"
35 #include "third_party/skia/include/core/SkBitmap.h"
36 #include "wtf/OwnPtr.h"
40 class WebGraphicsContext3DProvider;
42 // This is a GPU backed surface that has no canvas or render target.
43 class PLATFORM_EXPORT WebGLImageBufferSurface : public ImageBufferSurface {
44 WTF_MAKE_NONCOPYABLE(WebGLImageBufferSurface); WTF_MAKE_FAST_ALLOCATED;
46 WebGLImageBufferSurface(const IntSize&, OpacityMode = NonOpaque);
47 virtual ~WebGLImageBufferSurface();
49 virtual SkCanvas* canvas() const override { return 0; }
50 virtual const SkBitmap& bitmap() override { return m_bitmap; }
51 virtual bool isValid() const override { return m_bitmap.pixelRef(); }
52 virtual bool isAccelerated() const override { return true; }
53 virtual Platform3DObject getBackingTexture() const override;
54 virtual void didModifyBackingTexture() override;
55 virtual bool cachedBitmapEnabled() const override { return true; }
56 virtual const SkBitmap& cachedBitmap() const override { return m_cachedBitmap; }
57 virtual void invalidateCachedBitmap() override;
58 virtual void updateCachedBitmapIfNeeded() override;
62 // This raw-pixel based SkBitmap works as a cache at CPU side to avoid heavy cost
63 // on readback from GPU side to CPU side in some cases.
64 SkBitmap m_cachedBitmap;
65 OwnPtr<WebGraphicsContext3DProvider> m_contextProvider;